Swiveling chair



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A. J. ADAMS SWIVELING CHAIR June 19, 1928.

Filed July 27, 1925 manner. As shown herein, sai

Patented .lune 19, 1928.

UNITED STATES 1,674,081 PATENT ossia.

ARTHUR J'. ADAMS, 0l' BAY CITY, MICHIGAN ASSIGNOB T0 WILLIAM S. FEBBIB,TRAD- ING AS DOICRE CHAIR COMPANY, F ELKHABT, INDIANA.

BWIVELING CHAIR Application led July 27, 1925. Serial No. 46,228.

This invention relates to improvements in swiveling chairs and consistsof the matters hereinafter described and more particularly pointed outin the appended claims.

The primary object of the invention is to provide a novel and improvedbearing between the seat post and standard of a chair wherelli the tpostmay be quickly adjusted vertic y wi respect to the standard and at thesaine time may have a rotative bearing therein.

A `further Yobject of the invention is to provide a bearing constructionwherein a plain tubular post may be employed instead of the solidthreaded t as heretofore, thus eliminating the necessit of considerablemachine work with a resu tantreduction in the cost of manufactureand inthe weight of the finished chair.

These objects of the invention as well as others together with the manyadvantages thereof will more fully appear as I proceed with my siiication.

Fig. 1 is a view in front elevation of a swiveling chair embodyin myinvention.

Fig. 2 is a detail vertical sectional view on an enlarged scale as takenon the line 2-2 of Fig. 1.

Fig. 3 is a horizontal sectional view as taken on the line 3-3 of Fi 2.

Fi 4 is a detail vertica sectional view as ta en onthe line 4-'4 of Fig.3.

Fig. 5 is a rspectiveview of a binding or clamping co ar embodied in myimprove construction.

Referring now in detail to that embodiment of the invention illustratedin the accompanying drawings :-1 indicates the seat frame and seat of aswiveling chair, and 2 indicates the post upon the top end of which theseat frame is secured in an suitable post is tubular and has a smoothexterior surface as shed from a screw threaded exterior as eretofore. Asthe construction of the seat frame itself and the manner of attachingthe same to the post, forms no particular art of the present invention,it need not be ascribed in further detail.

3 indicates as a whole, the standard or base of the chair and with resct to which the post is vertically adjustab e and is capable of arotative bearin in any one of its adjusted positions. Sai standard ismade up of a plurality of tubular metallic legs, 4 each comprising avertical top portion or end 5 and a vertical bottom portion or end 6which is oilset'with respect to top portion and is connected thereto byintermediate horizontal and reversely curved portions 7. The bottom endof each leg is provided with the usual caster 8.

The top ends of said legs are grouped together about vertically spacedtop and bottom, spiders or plates, 9 and 10 respectively, each of whichincludes arcuately spaced ears 11 with which said leg parts are engagedand are secured to, as by the bolts .I2-12. Each plate includesvertically aligned depending bearing sleeves 9 and 10, res ctively, toreceive the tubular t 2. en the legs are secured to said spiders orplates, the bottom ends thereof are each disposed radially so that thestandard presents a stable support for the chair as a whole. Thehorizontal rtions of said legs are all connected toget er by a suitablebracing` spider 13.

Mounted on the tubular post 2, between the spiders or plates 9 and 10 isa tubular barre or housing 14 of a diameter substantially filling thespace between the legs at this point. Said housing includes a flatbottom or end wall 15 which has ain end vthrust rotative bearing on thetop surface of the bottom spider 10, and a top wall 16 which has a tuular extension 17 that has an end thrust bearing a ainst the bearingsleeve 9'l on the to spi er or plate 9. In said bottom wall o the barrelis provided a slot 18 (see Figs. 2 and 4) adapted to' register with aslot 19 in the bottom spider or late 19 for a urpose to ap ar later.

ocated in the Eottom end o the barrel is a binding ring or annulus 20(see Fig. 5) which fits somewhat loosely in said barrel and has a boreof a diameter permitting movement of the post therethrough when saidring stands in a plane at a right angle toesaid post. Said. ring has ahook 20a on one side thereof which engages a cross bar 21 formed in thebottom ortion of the barrel, diametrically opposite the slot 18 thereof.On the opposite side of said ring on one face thereof are formed twostuds 22-22 which receive the bottom ends of helical ex ansion springs213-23, the top ends of w ich enga e with the top wall of the barrel asbest own in Fig. 2. Said expansion springs 23 normally urge said ringinto a position wherein it is arlanged in a plane at less than a rightangle to the post. When the ring is brought into a right angularposition with respect to the post, as will later appear, said post andstandard are capable of a relative vertical movement. but.l however,when the angular position of lsaid ring is changed to one less than arighj angle, the said ring binds on the post and securely connects it tothe barrel so that the post and barrel are locked against relativeendwise movement but will be capable oi a rotating movement withrespectto the standard.

The means for bringing the ring into said right angular position againstthe action of the springs 23 is operable from without the barrel and isas follows; on the bottom surface of the bottom spider 10 between two ofthe ears. 11 and adjacent the slot 19 thereof before mentioned, is adepending ear or lug 24. livoted on said ear in the plane of the slot 19is a cam shaped member 25 (see Fig. 4) adapted to be entered throughsaid lslot. 0n the other side of said ear is pivoted a lever 26, thecommon pivotal axis of said cam member and lever being provided by a pin27. The short end of said lever is offset inwardly to engage a portionof said cam and is fixed thereto and the long outer end of said lever isoffset outwardly to pass the adjacent leg members of the standard and atthe same time provide the handle for actuating the cam.

Assume that the post 2 is in position with respect to the various partsbefore mentioned on the standard and that it is locked in one verticalposition with respect to the st andard by reason ofthe fact that thering 20 is disposed in the barrel in a manner to bind upon the post.Under such conditions the operating lever26 stands substantially vertlcal, and the cam 25 is located without the slot 19 in the bottomspider or plate 10. The post being gripped or bound by the ring ofcourse is non-rotatively fixed with respect to the barrel which havingend thrust bearing on the bottom plate 10 is free to rotate with respectto the standard.

Now assume that it is desired to adjust the seat and ost vertically(either upwardly or downwar ly) with respect to the standard, the seatis first turned so that the slot 18 in the bottom wall of the barrel isbrought into register with the slot 19 in the plate 10. The lever 26 isthen swung downwardly in a clockwise direction and the cam 25 will enterthe registering slots 19 and 18 and engage that part of the ringdirectly opposite the pivotal point thereotl and depress said part ofthe ring so that the ring stands in a position at a right angle to thepost thus releasing the binding action of the.

ring on the post. An upward or downward movement is then given to theseat and post until the desired adjusted height of seat is reached afterwhich the lever 26 is actuated to release the ring which again bindsupon the post as before described. 'lhus the adjustment is' quicklymade.

My improved construction has many advantages. 1t permits thc use of atube as distinguished from a threaded and key slotted .solid post, thusreducing not only the cost of manufacture but also the weight andmachine work required.

While in describing my invention, I have referred to certain details ofmechanical construction and arrangement of parts thereof, l do not wishto be limited thereto except as may be pointed out in the appendedclaims.

I claim as my invention:

1. A chair embodying therein, a `standard and a seat post having asmooth exterior, a tubular barrel like member surrounding said post,means on said standard engaging the ends of said barrel like member ioprevent endwise movement but to permit a rotativo movement thereof,means in said barrel like member for releasably binding said member tosaid seat post and a device carried by said standard and adapted to bepassed through a part of said barrel like member for releasing saidbinding means from the seat post.

2. A chair embodying therein, a standard and a seat post having a smoothexterior, a barrel like member through which the seat post extends,means on said standard and engaging the ends of said barrel like memberto prevent endwise movement but to permit a rotative movement thereof, aring located in said barrel like member for releasably binding saidmember to the post and a lever operated device carried by said standardand adapted to be passed through a part of said barrel like member forreleasing the binding ring from thc seat post.

3. A chair embodying therein, a standard and a seat post having a smoothexterior, said standard comprising a plurality of legs, spaced platesconnecting said legs together, a barrel like member arranged betweensaid legs and engaging at its ends with said spaced plates and throughwhich said seat post extends, a ring arranged in said barrel like memberand adapted to bind against said post, and means supported by one ofsaid spaced plates and adapted to be passed through a part of saidbarrel like member for actuating said ringr to release the bindingaction thereof from said post.

1. A chair embodying therein. a standard and a seat post having a smoothexterior, said standard comprisingr a plurality of legs and top andbottom connecting lates, a barrel like member having a rotative bearingarranged between said legs and engaging at its ends with said spacedplates so as to be capable of a rotative movement and through which saidpost extends, a ring arranged in said barrel like member and adapted tobind a ainst said post and means carried by one o said plates foractuating said ring to release the binding action thereof from saidpost.

5. A chair embodying therein, a standard including top and bottomplates, and a post extending through said platesz a barrel like memberarranged between said plates and having rotative bearing on one ofplates and surrounding a portion of said post, a binding ring in saidmember for connecting said member to said post, and means carried by oneof said plates for releasing the binding action of said ring.

6. A chair embodying therein, a standard including top and bottomplates, and a post extending through said plates, a barrel like memberarranged between said plates and having rotative bearing on one ofplates and surrounding a dportion of said post, a binding ring in saimember for connecting said member to said post, spring means in saidmember engaging said ring and normally urging it into binding action onsaid post and means adapted to extend through one o said plates andthrough a portion of said barre :for enga 'ng the ring to release itsbinding action 10m the post.

7. A chair embodying therein, a standard including top and bottomplates,and a post extending through said plates, a barrel like member arrangedbetween sald plates and having rotative bearing on one of plates andsurrounding a portion of said post, one of said plates and a portion ofsaid barrel like member have slots therein adapted in one relativeposition to register with each other, a ring in said member andsurrounding said post, spring means normally urging said ring intobinding action on said post and means located on one of said plates andadapted to be entered through said slots when in registering positionand to actuate the ring against said spring means to release the bindingaction of said ring on said post.

8. A chair embodying therein, a standard comprising a plurality of legmembers, top and bottom bearing plates to which the top ends of saidlegs are secured in a grouped relation, a barrel like member surroundingsaid post between said plates and ca able of a rotative bearing on oneof said p ates, a -ring in said barrel member pivoted at one sidethereto, spring pressed means in said barrel member engaging theopposite portion of said ring for holding the' ring in bindin engagementon said post, and means carried57 on that plate upon which the barrelmember bears, for releasing the binding action of the ring from saidpost.

In testimony whereof, I have hereunto set my hand, this 6th da of July,1925.

A THUR J. ADAMS.

